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    <title>Bootstrap 101 Template</title>

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<style>
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        padding: 15px 0;
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</style>

<body>
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                        <h3>jQuery</h3>
                        <p>jQuery</p>
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                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


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            <div class="col-xs-12 col-sm-6 col-md-4 col-lg-3">
                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


            </div>
            <div class="col-xs-12 col-sm-6 col-md-4 col-lg-3">
                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


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            <div class="col-xs-12 col-sm-6 col-md-4 col-lg-3">
                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


            </div>
            <div class="col-xs-12 col-sm-6 col-md-4 col-lg-3">
                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


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                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
                    </div>
                </div>


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                <div class="thumbnail">
                    <img src="./img/es6.jpg" alt="...">
                    <div class="caption">
                        <h3>jQuery</h3>
                        <p>jQuery</p>
                        <p><span class="label label-warning">Free</span>
                            <span class="label label-danger">基础</span>        
                            </p>
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                  <img src="./img/jquery.jpg" alt="...">
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    </div>
    <!-- 底部 -->
    <footer>
        <div class="container" style="display: flex; justify-content: space-around;">
            <dl>
                <dt class="h4">新手入门</dt>
                <dd>用户注册</dd>
                <dd>找回密码</dd>
                <dd>用户登录</dd>
            </dl>
            <dl>
                <dt class="h4">新手入门</dt>
                <dd>用户注册</dd>
                <dd>找回密码</dd>
                <dd>用户登录</dd>
            </dl>
            <dl>
                <dt class="h4">新手入门</dt>
                <dd>用户注册</dd>
                <dd>找回密码</dd>
                <dd>用户登录</dd>
            </dl>
            <dl>
                <dt class="h4">新手入门</dt>
                <dd>用户注册</dd>
                <dd>找回密码</dd>
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